Selection of steel pipe thickness
Thread Content
This post was last edited by 311yj on 2023-4-20 at 16:41. GB/T-28708-2012 – Specifications for the selection of seamless and welded steel pipes for pipeline engineering: Sch5S, Sch10S, Sch40S, Sch80S. S stands for stainless steel. Question 1: What do 5, 10, 40, and 80 represent? Kilograms? Question 2: For example, if my equipment is designed for a pressure of 50 kilograms, do I then need to look up the pipe wall thickness in the Sch80S category? Question 3: What should be done if the design pressure of that equipment exceeds 80 kilograms? Question 4: Or, for the wall thickness of the nozzles on pressure vessels, is it sufficient to perform hole reinforcement using the SW6 calculation software?
Question 1: 5, 10, 40, and 80 are all grades for pipe thickness, indicating different thicknesses of pipes, and have nothing to do with kilograms. Question 2: In the GB/T-28708-2012 standard, Sch80S denotes a pipe wall thickness of 80S (meaning that the actual thickness of the pipe can vary depending on the material used); it is a pipe thickness grade capable of withstanding high pressures. Given that the design pressure for your equipment is 50 kilograms, it is necessary to select an appropriate pipe wall thickness grade. The most suitable pipe size and thickness grade can be determined through calculations or by consulting a professional engineer. Question 3: If the design pressure of the equipment exceeds the Sch80S grade, higher-strength materials or a special pipe design must be used to meet the requirements. It is recommended to seek the guidance of a professional engineer to resolve such issues. .
https://baijiahao.baidu.com/s?id=1673901787652879826&wfr=spider&for=pc
The pipe wall thickness code is similar to the flange nominal pressure; different nominal diameters result in different nominal wall thicknesses. The load-bearing capacity, on the other hand, depends on the material type. Generally, the required pipe wall thickness is first calculated according to the relevant standards, after which factors such as corrosion allowance and negative wall thickness deviations are taken into account for rounding up, and then either the pipe wall thickness code is selected or the rounded nominal wall thickness is specified directly. When the pressure is low, the reinforcement of the container openings is generally provided by reinforcement rings ； When reinforcement rings are not suitable, thickened fittings are generally produced by forging and turning. If external loads such as axial forces and bending moments transmitted through the piping need to be considered during the connection process, local stress at the connection of the pressure vessel should also be checked.
6666666666666